{
  "manageEntity": {
    "action": "Save",
    "entityId": "443386953",
    "entityType": "Track",
    "nonce": "0x058754120950a102aa6f785dfd4a43df17c22549dc270f4850a3b6b0f469ba11",
    "signature": "0x11b3584711259ee2d1450af38bc46d6896b5a768a88dea868e50bb2e1da52e9e045ecf2befb6215b9a1874e19f0bf72afed551ab7e03f0e8bb15891b547179b41c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}